California Rayless Daisy, California Rayless Fleabane, Rayless Fleabane, Unadorned Fleabane: Erigeron inornatus var. inornatus - Disk flowers only.
Bloomer's Daisy, Scabland Fleabane: Erigeron bloomeri var. bloomeri is a rayless fleabane which is found in the Simcoe Mts. 10-20 miles east of the Klickitat River which so far has not been found on Mt. Adams or along the west bank of the Klickitat River.
Bitter Fleabane, Northern Daisy: Erigeron nivalis (Synonyms: Erigeron acris ssp. debilis, Erigeron acris var. debilis, Trimorpha acris var. debilis) - Ray flowers very short, erect, and often inconspicuous. Heads one to a few per stem, plants to 30 cm high.
Bitter Fleabane: Erigeron acris var. kamtschaticus (Synonyms: Erigeron acris ssp. politus, Erigeron acris var. asteroides, Trimorpha acris var. asteroides) - Ray flowers very short, erect, and often inconspicuous. Heads several to many per stem, plants 30-60 cm high.